Lego, films, shopping for teeny tiny clothes, the hilarity that comes with teaching them to speak (DS2 is 4 and speaks perfectly apart from saying 'rulf' instead of 'wolf', it's ridiculous but it cracks me up every time he says it).
Watching them grow up and achieve stuff; DS1 is 9 and has ASD so has to work incredibly hard to do stuff that some other kids find easy. Rather than quit he works his socks off and it kills me with pride, watching him do well, watching him get that glow when he knows he's achieved something.
And the unquestionable love they give; DS2 doesn't care if I'm sad, happy, clean, dirty, rich or poor. He'll throw his arms about my neck, kiss my cheek and shout "hello there, my pretty" every time I collect him from nursery. Reading at bedtime with DS1, who even though he's 9 will still have a bedtime story.
Holidays; spending entire days on one beach doing not very much, digging holes for them to sit in, cricket on the campsite in the evening, milkshakes on the front at Mumbles.
I love my life when I look at this thread. Love it. It's entirely different to my pre-child life. And endlessly better.